Roll-grinding machine.



L. R. HEIM.

ROLL GRINDING MACHINE.

APP'LICATION FILED JULY 13. my.

Patented May 7,1918.

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WITNESS T INVENTQR 04 4 Q ATTORNEY L R. HEIM.

ROLL GRINDING MACHINE. APPLICATION FILED JULY 13, 1912.

La jfi b fifia Patented May 7,1918.

4 SHEETSSHEET 2.

WITNESS INVENTOR ATTORNEY 'L R. HEIM. ROLL GRINDING MACHINE-APPLICATION, FILED JULY 13. 1917.

Patented May 7,1918.

4 SHEET$*SHEET 3 IIVNVENTOI? A2, ATTORNEY is: lrrlsrLx J WITNESS L R.HEIIVI.-

ROLL emwome MACHINE.

I APPLICATION FILED JULY 13. I917. LQMM Patented May 7,1918.

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WITNESS lNVENTQR @MK 4 4 M 6 BY ATTORNEY illfl I ittion.

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LES It. HJEIM, OF DANBURY, CONNECTICUT, ASSIGNOR TO THE BALLANJDROLIILER BEING COMPANY, OF DANBURY, CONNECTICUT, A CORPORATION OFCONNECTICUT.

ROLL-GRINDING MACHINE.

lowing is a specification.

I This invention has for its object to provide a machine for grindingcylindrical,

conical or headed blanks in large quantities by means of a peripherallyoperative grinding wheel rotating at a relatively high speed, incombination with a regulating wheel rotating at a relatively low speedin the opposite direction, andpreferably having its peripherycoiiperatin with the grinding wheel, in combination wit a rest orcarrier to support the blanks during the grinding opera- The employmentof a peripheral grinding wheel, with or without a peripheral regulatingwheel, has a number of prac tical advantages, such for example assimplified feeding of the blanks, since they may be fed in either fromthe side or from above, better clearance, and it is much easiertomaintain the wheels true. Moreover, headed articles such as bolts can bereadily ground on this machine either on the shank or on the head, orboth, and the shank can be ground close 11 to the head. Moreover,tapered or conica articles can be readily ground.

The invention comprises generally-a base carrying a pair of rotatablyadjustable tables, each table carrying a slide and each slide carrying awheel and its bearings, the bearings being arranged transversely of theslides so that the peripheries of the wheels will pro 'erly coact. Theslides are preferably yie dingly pressed toward each other, andadjustable stops or gages are provided for limiting this movement, sothat the mini-. mum distance between the wheels can be accuratelyadjusted, thereb insuring accuracy and uniformity of the nished work.The invention lends itself especially to theemployment of conical orbeveled peripheral wheels, which are especially useful for grindingclose to shoulders or heads, and. which can also be used for cylindricalor taper' grinding upon proper adjustment of the grinding surfaces.

Specification of Letters Patent.

Application filed July 13, 1917. Serial No. 180,461.

Patented May W, 1191.

, One form-of the invention is illustrated in the accompanying drawingswherein,

Figure 1 is a front elevation of the ma to chine,

Fig. 2is'a side elevation seen left of Fig. 1,

Fig. 3 is a top plan view,

from the Fig. 4 .is an elevation partly in section regulating wheels tothe blank support or carrier, and

Fig. 6 is a detail showing peripherally beveled wheels adapted togrinding a bolt.

1 represents a base carrying a plurality of tables 2 adapted to beangularly adjusted 7 relatively to each other by bolts 3 working inslots 4.. Each table is provided with a slide 5 carrying bearings 6 andshafts 7 8 respectively. The shaft 7 is provided with a peripheralgrinding wheel 9, and the shaft '8 with a peripheral regulating wheel10,

both of these wheels rotating in the same direction, but owing to beingperipheral wheels, their adjacent surfaces rotatedn opposite directions,as shown in Fig. 5; EX-

tending between the two wheels is a blank support or carrier 11, mountedas shown in Figs. 1 and 4 on a vertically and laterally adjustablebracket 12. The bracket 12 is adjusted vertically by a set screw 13 andlaterally by set screws 14, so as to accurately position the carrierrelatively to the wheels. Each wheel may be inclosed by a casing as 16having openings to expose the wheels.

The slides 5 are each provided'with a rack .17, which is engaged by apinion 18 mounted on the table 2, the pinions 18 being operated bylevers 19 and springs 20. The

springs act to normally feed the slides to ward each other, and in orderto limit this as movement each slide is provided with a depending lug 21carrying a gage screw 22 which can e set to engage the table 2 to limitthe movement of the slides. While the slides for both the grinding andthe regulating wheels are shown as similarly mounted, one wheel could befixed, and still permit of a backward yielding motion suflicient toaccommodate over size blanks with- 30 e owing to the rapid increase ofclearance be-',

out danger; of either springing the wheel shafts, or breaking thewheels. 23 is a dis charge chute for the ground blanks, and 24 is adriving pulle'y for each wheel.

In Fig. 6, the shafts 7 8 are similarly arranged as before, but thegrinding and regulating wheels 26, 27 are beveled as close to the head,bolts can e ground withcylindrical wheels. It will also beseen thatordinary cylindrical articles such as rollers for bearings or othercylindrical articles can readily be ground. The blanks can be fed in byhand or in' an other suitable manner, either fromthe si e along thecarrier 11 in the case of cylindrical blanks, or from above either forcylindrical, tapered or headed blanks.

By this invention, a wide variety of blanks can be rapidly andaccurately ground, and

tween two peripheral wheels, the ground blanks readily feed themselvesout without clogging. Further advantages reside in the readiness withwhich the wheels can be trued, the adjustability' of themachine, and thesimplicity. Various changes and modifications can be made in the detailsherein described without departing from the scope of the appendedclaims. r

What is claimed, is:

1. A grinding machine comprising a r0- tary peripheralv grinding wheelhaving a relatively high speed, an oppositely rotatmg 45 regulatingwheel having a' relatively low speed and cooperating with saidperipheralgrinding wheel, means between said wheels for supporting the blankswhile being ground, andmeans for yieldingly pressing one of said wheelstoward the other.

2.. A machine for grinding cylindrical or like blanks comprising aperipheralgrinding wheel mounted to be bodily movable in one dlrectionto a predetermined position, a

peripheral regulatlng wheel having a rela-- .tively low speed locatedadjacent the predeternuined position of said grinding wheel, a carrier,for supporting the blanks, mounted independentlyof and between "saidwheels and means for yieldingly pressing said I wheels toward eachother.

3. A machine for grinding cylindrical or like blankscomprisingrelatively. fast and slow grlnding and, regulating wheels having theirperipheries cooperatively rotating in .speed, an oppositely movinopposite directions, means for yieldingly forcing said .wheels towardeach other, means for limiting the movement of one or both of saidwheels toward the other, and a blank-supporting carrier between saidwheels.

4. A machine for grinding cylindrical or like blanks comprising aperipheral grinding wheel rotating at a relatively fast speed,a'peripheral regulating wheel adjacent said grinding wheel, and rotatingat a relatively Wheels being relatively yieldingly mounted,spring-controlled means for forcing said wheels toward each other, ablank support, and means for limiting the movement of said wheels towardeach other.

5. The combination with a base, of a pair of slides mounted thereon andmovable toward and from each other, a relatively fast moving grindingwheelmounted on one of said slides at one side thereof, a relativelyslow moving regulating wheel similarly mounted on Lhe other slide sothat the peripheries of said wheels coiiperate with each other, meansfor moving said wheels toward each other, limiting means, and avertically and longitudinally adjustable carrier mounted on said baseand extending between the peripheries of said wheels.

6. The combination with a base, of a pair of tables rotatably mountedthereon, means for locking said tables, a slide on each table mounted tomove toward and from each other, bearings on said slides arrangedtransversely thereof, a wheel on each shaft arranged to have cooperatingperipheries, and a carrier between said wheels. I

7. The combination with a base, of a pai of tables rotatably mountedthereon, means for locking said tables, a slide on each table -low speedin the opposite direction, said A mounted to move toward and from eachperipheries, and

said shafts, and spring-pressed slides on which said bearings aremounted.

9. A machine especially adapted for grinding the shanks of headedblanks, such as bolts, comprising a wheel having a grinding peripherydriven at a relatively high vregulating wheel driven. at a relatively owspeed, a

blank-support between said wheels, shafts by which said wheels arecarried, bearings for said shafts, springpressed slides on which saidbearings are mounted, and positioning means for limiting the movement ofone or both of said slides toward the other.

10. A grindin machine comprising a base having a pair 0 rotatablyadjustable tables, aslide carried by each-table, bearings and a shaftextending transversely of each slide,

a wheel on each shaft arranged ,sothat their 10 peripheries coact, and acarrier supported by the frame and located, between said Wheels, one ofsaid wheels being a regulating heel and moving at'a lower speed oppositeto the grinding wheel.

In testimony whereof I ailix my signature.

LES n. HEIM.

